Great thought behind this, putting the slides outboard of the media. We had a sliding door in the cabinet at a former employer. BUT the door was a thin piece of metal that slid INSIDE a channel just thick enough for it. It was a pure PITA because just from use the slot would pack up with media making the door almost impossible to open without first vacuuming completely clean, (defeating the purpose) then using a hammer because the door would STILL be stuck! I'll be building a cabinet soon, and the bottom will borrow some design cues from your idea. Great job.